Feedrate scheduling method for five-axis dual-spline curve interpolation

US11188056B2 · kind B2 · utility

Assignee

• Dalian University of Technology · CN

Inventors

• Zhenyuan JIA · 东风镇, CN
• Jianwei Ma · Dalian, CN
• Dening Song · Dalian, CN
• Siyu Chen · Beijing, CN
• Guangzhi He · Dalian, CN
• Fuji Wang · 东风镇, CN
• Wei Liu · Lo Wu, CN

Key dates

• Filing date: Jan 7, 2018
• Grant date: Nov 30, 2021
• Expiry date: Jun 10, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B2219/43156
• WIPO field: Control
• WIPO sector: Instruments

Abstract

This invention, a feedrate scheduling method for five-axis dual-spline curve interpolation, belongs to multi-axis NC (Numerical Control) machining filed, featured a feedrate scheduling method with constant speed at feedrate-sensitive regions under axial drive constraints for five-axis dual-spline interpolation. This method first discretizes the tool-tip spline with equal arc length, thus getting the relation between the axial motion and the toolpath by computing the first, second, and third order derivatives of the axial positions with respect to the tool-tip motion arc length. After that, determine the feedrate-sensitive regions with the constraints of axial drive limitations and the objective of balanced machining quality and efficiency. Finally, determine the acceleration/deceleration-start-point curve parameters by bi-directional scanning. The invented method can effectively make a balance between the feed motion stability and efficiency in five-axis machining, and possesses a high computational efficiency and a good real-time capability.